Pump



FIG. 1 is a perspective view of a pump showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a cross-sectional view taken along line 7--7 in FIG. 5; and,

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a pump, as shown and described. 